MATERIALS LETTERS
·
2023
·
IF 3
Yulin Zhang,Xiteng Li,Dongjie Yang,Hu Cai,Ziqi Ma,Yu Zhang,Suihan Cui,Zhongzhen Wu
Herein, the three-dimensional (3D) flower-like pigments of micro-nano scaled zinc phosphate (FZP) and ammonium zinc phosphate (FNZP) were successfully synthesized by hydrothermal synthesis method for improving the corrosion resistance of waterborne epoxy (WEP) coating. The micro-structures, chemical compositions and corrosion resistance of the as-obtained specimens were characterized by SEM, XRD, FT-IR, XPS and EIS, respectively. The results indicated that the 3D flower-like FZP and FNZP pigments were comprised of self-assembled nano-micro sheets with an average thickness of 20 nm ∼ 100 nm. Moreover, the remarkable enhancements of compactness and anticorrosion performance, especially for the FNZP-incorporated coating, were principally contributed to the well dispersibility and favourable solubility, which lengthened the permeation pathway and promoted the formation of passivation film.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Carbon Letters
·
2022
·Vol. 32
·期 5
·1365-1376
·
IF 3.117
Xu Yuxuan,Tu Chuanjun,Liu Yanli,Liu Ping,Chen Gang,Tan Jiao,Xiong Wei,He Yubo,Liang Shilin,Ma Qingchun
High-temperature friction performances of graphite blocks (GBs) and zinc phosphate impregnated graphite blocks (IGBs) were evaluated under various friction temperatures. The surface of IGB exhibited extremely lower average friction coefficient values, that was 0.007 at 400 °C and 0.008 at 450 °C, in comparison to that of GB (0.13 at 400 °C and 0.16 at 450 °C, respectively). The worn surface of IGB in the high-temperature friction test was smoother and more complete than that of GB. The wear under high temperature and load caused the transformation of zinc pyrophosphate to zinc metaphosphate and the formation of a continuous large-area boundary lubrication layer combined with graphite and metallic element on the wear surface. The superior tribology property of IGB could be attributed to the digestion of iron oxides by tribo-chemical reactions and passivation of the exposed dangling covalent bonds. Specifically, the layered structure generated on the IGB wear interface effectively decreased the adhesive forces and prevented the surface from serious damage.
研究领域:
材料科学
·
摩擦学
✓ 已验证
DOI
高影响因子
CHEMICAL PAPERS
·
2021
·Vol. 76
·期 1
·409-416
·
IF 2.097
Liu Jiongyan,Jian Mulin,Chen Lvyun,Xu Ningning,Li Dong,Zhao Shihuai
Phosphating treatment is an effective process to inhibit corrosion of steel materials. In practical application, additives often need to be introduced into phosphating bath in order to achieve some desired properties. In this paper, polyethylene glycol was used as an additive for zinc phosphating treatment. The structure of the zinc phosphate conversion coating was studied by scanning electron microscope and X-ray powder diffractometer. And corrosion resistance of the zinc phosphate conversion coating was tested by means of electrochemical impedance spectroscopy and Tafel polarization methods. Experiments show that polyethylene glycol can be used as a precipitating bed for capturing metallic ions, thus facilitating the nucleation of phosphate crystals. The growth trend of hopeite (Zn 3 (PO 4 ) 2 ·4H 2 O) crystal increases along (020) and (220) directions, and the crystal growth changes from axial direction to radial direction. When the concentration of polyethylene glycol was 0.8 g/L, the zinc phosphate conversion coating exhibited the most uniform and dense structure and strongest corrosion resistance. In addition, polyethylene glycol plays an important role in improving the adhesion between phosphate conversion coating and organic coating.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2024
·
IF 7.6
Chao Yang,Chenyu Wang,Xuanzi Zhao,Zhao Shen,Min Wen,ChaoChao Zhao,Liyuan Sheng,Yaoguang Wang,Daokui Xu,Yufeng Zheng,Paul K. Chu,Xiaoqin Zeng
Corrosion caused by the active chemical properties of magnesium (Mg) alloys seriously restricts their applications in aerospace, transportation, biomedicine, and other fields. Although micro-arc oxidation (MAO) coatings can provide some corrosion protection for Mg alloys, their microporous structure is prone to localized corrosion. Herein, nanoflower-shaped zinc phosphate is prepared and hydrophobically modified. The commercial glue is used to bond the nanoflower-shaped zinc phosphate particle arrays to the MAO-coated AZ31B alloy substrate to produce a two-layer composite coating with superhydrophobic properties. The composite coating exhibits obvious repulsive effects in salt and acidic solutions as indicated by contact angles of 160° and 156°, respectively. The composite coating has improved electrochemical properties and immersion corrosion in both the salt and acidic solutions compared to the substrate and MAO-coated sample. Moreover, the composite coating retains the long-term superhydrophobic effects under different conditions such as immersion in salt and acidic solutions, water scouring, and sunlight exposure, which well indicates commercial applications.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Huaixian Xiao,Na Liu,Ke Tian,Shixiang Liu,Fei Ge
Nanoparticles have been reported to induce toxicity to aquatic organisms, however, their potential impacts on phosphorus removal from wastewater by algae are unclear. In this study, the effects of nanoparticle ZnO (nano-ZnO) on phosphate (PO 4 3− ) removal by a green alga Chlorella vulgaris were investigated. We found that PO 4 3− removal efficiency was accelerated with high concentrations of nano-ZnO (0.04–0.15 mM) but reduced with low concentrations of nano-ZnO (0.005–0.04 mM) compared to the control (without nano-ZnO), suggesting that PO 4 3− removal efficiency by C. vulgaris was related to nano-ZnO concentrations. Moreover, we observed changes of nano-ZnO morphology and detected element P on the surface of nano-ZnO by using transmission electronic microscopy (TEM) combined with energy dispersive X-ray spectroscopy (EDX), indicating that PO 4 3− was interacted with nano-ZnO or the dissolved Zn 2+ from nano-ZnO. Furthermore, we confirmed this interaction induced the formation of Zn 3 (PO 4 ) 2 crystallites sedimentation by employing X-ray diffraction analysis (XRD) and X-ray photoelectron spectroscopy (XPS), which finally accelerates the removal of PO 4 3− .
研究领域:
环境科学
·
水处理
·
藻类生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Yongjun Sun,Mengjiao Ren,Chengyu Zhu,Yanhua Xu,Huaili Zheng,Xuefeng Xiao,Huifang Wu,Ting Xia,Zhaoyang You
In this study, acrylamide and [2-(acryloyloxy)ethyl] trimethylammonium chloride were grafted onto CS by UV initiation to obtain an environmentally friendly graft copolymer, CS-g-poly(acrylamide-acryloyloxyethyl) trimethylammonium chloride (CS-g-PAD). Poly(acrylamide-acryloyloxyethyl) trimethylammonium chloride was named as PAD. Nuclear magnetic resonance hydrogen spectroscopy (1H NMR), X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and thermal gravimetric analysis (TG-DSC) were used to characterize CS-g-PAD. Results confirmed the synthesis of CS-g-PAD. SEM results showed that CS-g-PAD exhibited a porous structure with numerous 2–6 μm micropores. The enhanced CaCl2-aided flocculation tests of wastewater contaminated by zinc phosphate coating indicated that CS-g-PAD had better flocculation performance than PAD and the commercially available cationic polyacrylamide (CPAM). The removal rates of zinc concentration, total phosphorus concentration, and chemical oxygen demand were 99.3, 98.8, and 72.5%, respectively, at 6 mg·L–1 CS-g-PAD and pH 10. The precipitated flocs were mainly in crystalline form.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2022
·Vol. 69
·期 6
·912-924
·
IF 1.753
Majid Rezaei Abadchi,Majid Mirzaee,Erfan Dorkhani,Ashkan Zolriasatein,Nastaran Riahi Noori
The use of organic coatings is the most common method of corrosion protection of metal structures in aggressive environments which act as a barrier between the corrosive environment and the metal structure. In this work, to increase the corrosion resistance and UV resistance of steel structures, an acrylic coating containing titanium oxide (TiO 2 ), zinc phosphate (ZP), and benzophenone was used and the coating was characterized by open circuit potential (OCP) techniques, electrochemical impedance spectroscopy (EIS), dynamic polarization, Adhesive strength, salt spray, and UV weathering. The results showed that in the case of the acrylic sample, it has poor corrosion resistance and requires the presence of nanofillers. With the presence of TiO 2 nanofillers, microporous and other defects were effectively blocked and the penetration of corrosive components into the interface of the metal coating and substrate was prevented. In the presence of ZP along with TiO 2 , all anodic and cathodic sites were coated with a film consisting of inhibitors released from zinc phosphate nanoparticles and thus acted as a barrier against electrolyte penetration into active metal sites. With the presence of an anti-UV agent, benzophenone partially blocked surface defects and along with corrosion products prevented a sharp drop in resistance over longer periods.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Youtong Wu,Shaoguo Wen,Jihu Wang,Guangyu Wang,Kai Sun
Graphene oxide zinc phosphate (GO-ZP) composites were synthesized by a one-step ultrasonic wave- assisted method and then incorporated into waterborne polyurethane as the anticorrosive reinforcement to produce graphene oxide zinc phosphate/polyurethane (GO-ZP/PU) composites. The GO-ZP composites were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The anticorrosive properties of the GO-ZP-reinforced PU composite coatings were characterized by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The correlations among the mass ratio of GO to Zn3(PO4)2, the concentration of GO- ZP added to the waterborne polyurethane (WPU) and the anticorrosive properties of the composites were investigated. The results showed that excellent anticorrosive properties were achieved for the GO-ZP/PU composite with the 0.5 wt% GO-ZP (3:1) coating, which had a corrosion current density ( i corr) of only 4.41×10 -7 A/cm 2 and a charge transfer resistance (Rct) of 1.104 ×10 1 Q cm 2 .
研究领域:
材料科学
·
腐蚀与防护
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2021
·Vol. 11
·期 11
·1412
·
IF 2.881
Wenbo Li,Yue Jiang,Dingguo Liu,Jiran Zhu,Yi Xie,Lanlan Liu
We aimed to improve the corrosion resistance of transmission network cabinet equipment in high temperature and humidity environment. In this paper, using acid modified acrylic acid as the main component, the composite conversion agent was obtained by adding phosphoric acid phytic acid and other components. Through the surface morphology, electrochemical test and adhesion force test of rust conversion coating, the versatility and corrosion resistance of rust conversion coating on the substrates were analyzed. Combined with zinc phosphate primer, the effect of rust conversion agent on the adhesion and salt spray corrosion resistance of the commercial primers was studied. The composite conversion agent has good effect on atmospheric corrosion rust layer. The corrosion resistance and adhesion force of the atmospheric corrosion rust layer treated with rust conversion agent were significantly increased. The adhesion of zinc phosphate primer on atmospheric corrosion rust coating with rust conversion was three times higher than that of atmospheric corrosion rust coating without rust conversion, respectively. Composite rust conversion agent has broad versatility, which can be used for rust conversion of atmospheric corrosion rust layer. At the same time, it has a good corrosion resistance, that can obviously improve the corrosion potential of the corroded surface and reduce the corrosion current density. In addition, the composite rust conversion agent can significantly improve the adhesion and corrosion resistance of the primer coating.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-23
·
IF 12.6
Zuo Kangqing,Li Aonan,Si Taoning,Lei Weiyi,Liu Yusheng,Zhang Linbo,Zhang Taixing,Xiao Guiyong,Lu Yupeng,Li Ningbo
Phosphate conversion coatings on metallic implants can synergistically integrate functional components and structural regulation, offering excellent biocompatibility and osteogenic activity. However, the passive oxide layer on the titanium (Ti) surface impedes the following chemical reactivity, adversely affecting the microstructure and properties of phosphate coatings. This study proposes a strategy for achieving structural optimization and properties enhancement of strontium-zinc phosphate (SrZnP) conversion coatings on Ti via regulating interface chemical reaction between coatings and Ti substrates. The results indicated that Sr 2+ and Zn 2+ ions-preloading (IPL) treatment enhanced the interfacial reactivity, which can further achieve crystal refinement and uniform crystal size in nucleation. In contrast, microstructural modifications on Ti substrates induced by acid etching, sandblasting, and alkali etching had minimal effects on the phase composition and crystal morphology (irregular cubic) of the SrZnP coatings. The coatings on IPL-Ti exhibited better mechanical properties and corrosion resistance. Besides, the coatings with optimized structures and surface characteristics elicited bacterial growth inhibition rates of 91.09% and 84.04% against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ), respectively. Meanwhile, the crystal-refined coatings further significantly enhanced the adhesion, proliferation, and differentiation of bone marrow mesenchymal stem cells (BMSCs), proving anticipated osteogenic activity. Overall, the ions preloading strategy on variable micro/nanostructured Ti substrates facilitates the potential application of Sr/Zn-phosphate conversion coatings for repairing infected bone defects.
研究领域:
生物材料学
·
医学工程
·
表面科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2024
·Vol. 32
·期 1
·119-126
·
IF 5.6
Wang Xiaoxue,Jin Lulu,Wang Jinke,Wang Rongqiao,Liu Xiuchun,Gao Kai,Sun Jingli,Yuan Yong,Ma Lingwei,Qian Hongchang,Zhang Dawei
The atmospheric corrosion monitoring (ACM) technique has been widely employed to track the real-time corrosion behavior of metal materials. However, limited studies have applied ACM to the corrosion protection properties of organic coatings. This study compared a bare epoxy coating with one containing zinc phosphate corrosion inhibitors, both applied on ACM sensors, to observe their corrosion protection properties over time. Coatings with artificial damage via scratches were exposed to immersion and alternating dry and wet environments, which allowed for monitoring galvanic corrosion currents in real-time. Throughout the corrosion tests, the ACM currents of the zinc phosphate/epoxy coating were considerably lower than those of the blank epoxy coating. The trend in ACM current variations closely matched the results obtained from regular electrochemical tests and surface analysis. This alignment highlights the potential of the ACM technique in evaluating the corrosion protection capabilities of organic coatings. Compared with the blank epoxy coating, the zinc phosphate/epoxy coating showed much-decreased ACM current values that confirmed the effective inhibition of zinc phosphate against steel corrosion beneath the damaged coating.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Chao Yang,Hu Cai,Suihan Cui,Jian Huang,Jiayu Zhu,Zhongcan Wu,Zhengyong Ma,Ricky K.Y. Fu,Liyuan Sheng,Xiubo Tian,Paul K. Chu,Zhongzhen Wu
Corrosion protection of magnesium alloys is a challenge in industrial applications because of the high chemical reactivity of Mg. In this work, a coating is prepared by plasma electrolytic oxidation (PEO) on the AZ31B Mg alloy and then modified by insoluble zinc phosphate to improve the corrosion resistance . To avoid the influence of the weak acidic Zn-containing electrolyte on the formation of the passivation layer on the magnesium alloy, a two-step process is designed to first produce a passivation layer before introduction of zinc phosphate. Zinc phosphate is mainly distributed on the surface and the sidewalls of the holes in the porous coating and blocks the interactions between the corrosive solution and Mg substrate. The corrosion potential of the optimal coating (Zn-15) increase while the passive current density at the terminal potential decreases, suggesting the significantly improved corrosion resistance compared to the pristine AZ31B. The life time demonstrated by neutral salt spraying is 4200 h that is about 3 times longer than that observed from the Mg alloy with the undoped coating.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）